Combination door knob and bell.



PATENTED'MAR. 5, 1907.

J. T. FOERSTE-R. COMBINATION DOOR KNOB AND BELL.

APPLICATION FILED APRVIO, 1906.

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UNITED STATES PATENT OFFICE.

JULIUS T. FOERSTER, OF CHICAGO, ILLINOIS, ASSIGNOR TO CHRISTIAN N. MICHELS, OF CHICAGO, ILLINOIS.

Specification of Letters Patent.

Patented March 5, 1907.

Annlication filed April 10,1906. Serial Nn- 310,950.

To 60% whom it may concern:

I This sleeve has a notch 27, which may or Be it known that I, JULIUS T. FOERSTER, a may not register with the notch 22. The

citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in a Combination Door Knob and Bell, of which the following is a specification.

This invention is a combination door knob and bell, and has for its object to provide an improved device in which when the outer knob is turned a bell forming part of the in ner knob will be sounded. Means are provided for preventing the sounding of the bell when desired.

The invention is illustrated in the accompanying drawings, in which Figure 1 is a side elevation of the device. Fig. 2 is a central longitudinal section. Fig. 3 is a detail in pesrpective, showing the means for preventing sounding of the bell when the inner knob is turned. Figs. 4 and 5 are views, partly in section, of the same means in different positions. Fig. 6 is a plan view showing the interior construction of the bell.

Referring specifically to the drawings, 6 indicates the outer knob, fast upon the latchspindle 7. The bell-knob consists of a base portion 8 and a bell portion 9, the latter of which screws upon a screw-stud 10, which projects from a bracket or support 1 1, mounted upon the base portion 8 of the knob. The spindle 7 is squared and reduced at the end which enters the bell-knob, as indicated at 7 and said reduced portion fits loosely within a sleeve 12, which is mounted to rotate within the base of the knob. This sleeve carries a gear 13, which meshes with a pinion 14, secured to a gear-wheel 15, which meshes with a pinion 16, which rotates upon the stud 10. The latter pinion carries radial arms 17, upon which the hammers 18 are mounted. These hammers act centrifugally to strike a projection 9 on the inside of the bell, the radial action being permitted by a pin-and-slot connection, as at 19, with the arms 17.

The shank 20 of the knob-base 8, which fits loosely over the latch-spindle 7, has therein a slot 21, the inner edge of which is provided with a notch 22. The spindle 7 has projecting therefrom a pin 23, which extends through the slot 21. The knob-shank 20 also has thereon a sleeve 24. slotted, as at 25, to receive a pin 26, projecting from the shank.

shank also has at its inner end a lug 28, against the inner face of which presses a spring 29, secured to the door. A crosspieec 30 is secured at its ends to the door and extends across over the spindle and has shoulders 31 arranged to engage the sides of the lug 28. These parts are inclosed and con cealed under the escutcheon 32.

The bell-knob is loose upon the spindle 7, as stated, and may be turned and also moved in and out to the extent permitted by the slot 21 without turning the spindle, or rather the spindle may be turned without turning the knob. Then the bell-knob turns with the spindle, the bell does not sound. When the spindle is turned and the bell-knob does not turn, the bell is sounded. When the parts are in the position shown in Fig. 4, with the notches 22 and 27 registering, the spring 29 bearing against the lug 28, forces the knob outwardly, and the pin 23 enters said notches. If now the bell-knob be turned, the spindle will also turn and operate the latch, and the bell will not sound. When in the position shown in Fig. 5, the sleeve 24 is shifted so that the notches 22 and 27 do not register, and the edge of the sleeve pre vents the pin 23 from entering the notch 22. The spindle is thus free to turn within the shank 20 at least to the extent permitted by the slot 21, and when turned by the outside knob the bell-knob remains stationary, and the relative movement of the parts, by means of the train above described, swings the hammer-arms and causes the hammers to strike and sound the bell. I

Thesleeve 24 is set at desired position by hand. To locate the parts so that the bell will not ring, it is set as shown in Fig. 3. To set the device so that the bell will ring, the knob 9 is pressed forward, forcing the lug 28 between the shoulders 31, when the sleeve 24 can be turned to the position shown in Fig. 5.

I claim- In a device of the kind stated, the combination of a spindle having a fast knob on one end and a loose bell knob on the other, the bell-knob having a tubular shank fitting loosely over the spindle and provided with a slot having a notch in the edge thereof, and

the spindle having a pin projecting into the name to this specification in the presence of slot and adapted to engage in the notch, a 0 two subscribing Witnesses.

spring bearing upon the shank and tendin to engage the pin in the notch, to cause the JULIUS FOERSTER' 5 spindle and sleeve to turn together, and) Witnesses:

means to prevent such engagement. SIGNA FELTsKoG, In testimony whereof I have signed my H. G. BATCHELOR. 

